--- a/toolkit/components/telemetry/tests/unit/test_TelemetryEnvironment.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryEnvironment.js
@@ -445,17 +445,17 @@ function checkSettingsSection(data) {
   Assert.equal(typeof update.autoDownload, "boolean");
 
   // Check "defaultSearchEngine" separately, as it can either be undefined or string.
   if ("defaultSearchEngine" in data.settings) {
     checkString(data.settings.defaultSearchEngine);
     Assert.equal(typeof data.settings.defaultSearchEngineData, "object");
   }
 
-  if (gIsWindows) {
+  if (gIsWindows && AppConstants.MOZ_BUILD_APP == "browser") {
     Assert.equal(typeof data.settings.attribution, "object");
     Assert.equal(data.settings.attribution.source, "google.com");
   }
 }
 
 function checkProfileSection(data) {
   Assert.ok("profile" in data, "There must be a profile section in Environment.");
   Assert.equal(data.profile.creationDate, truncateToDays(PROFILE_CREATION_DATE_MS));